The VitaGuard VG 3100 monitors oxygen saturation (SpO2), heart rate and respiration of risk patients of all ages, thus giving medical personnel and caregivers the security they need, both in ambulatory and clinical environments. It generates acoustic and visual alarms when no respiration or movement is detected for a preset time, i.e. central apnea, or when the measured oxygen saturation or heart rate violates the limits set by the operator.